C ++ learning basic homework submission [Address Book Management System]
First introduce the system requirements: 1. Add contacts: Add contact information (name, gender, age, phone number, address) to the address book with no more than
1000 people; 2. Display contacts: 3. Delete contacts
: delete according to name
;
First, judge the number of contacts in the current address book. If it is not empty, use a for loop to output the contacts in the address book; [involving trinocular calculation ] 3. delPerson(): delete the contact. First, you need to use the isExist function to judge the contact to be deleted. If it exists, isExist returns an i
, before proceeding to the next step of deletion;
4. findPerson(): Find contacts. First use the isExist function to determine whether the contact exists, and print it if it exists, otherwise the output will find no such person;
5. modifyPerson(): delete the contact
6. clearPerson(): clear the contact
#include<iostream>
using namespace std;
#include<string>
#define MAX 1000 // 定义的宏常量； 最大人数
// 定义 联系人 的结构体
struct Person {
string m_Name; // 姓名
int m_Age;
int m_Sex; // 性别
string m_phone;
string m_Addr; // 地址
};
// 定义通讯录的结构体，这里还使用到了结构体嵌套
struct AddressBooks {
// 定义一个数组personArrary，类型为Person，数组最大长度为MAX
// 通过 abs->personArrary[i] 访问第 i 个联系人的信息；
struct Person personArrary[MAX]; // 结构体嵌套；功能：通讯录中保存的联系人数组
int m_Size; // 通讯录中人员个数
};
// 菜单显示
void showMenu() {
cout << "***************************" << endl;
cout << "***** 1、添加联系人 *****" << endl;
cout << "***** 2、显示联系人 *****" << endl;
cout << "***** 3、删除联系人 *****" << endl;
cout << "***** 4、查找联系人 *****" << endl;
cout << "***** 5、修改联系人 *****" << endl;
cout << "***** 6、清空联系人 *****" << endl;
cout << "***** 0、退出通讯录 *****" << endl;
cout << "***************************" << endl;
}
// 1、添加联系人
void addPerson(struct AddressBooks *abs) {
// * abs 并不是解引用，只是用来接受传入的地址
if (abs->m_Size == MAX) // 使用 -> 运算符 获取当前通讯录中人数
{
cout << "通讯录满了，无法添加" << endl;
}
else {
//姓名
string name;
cout << "请输入 姓名：" << endl;
cin >> name;
abs->personArrary[abs->m_Size].m_Name = name;
cout << "请输入性别：" << endl;
cout << "1 -- 男" << endl;
cout << "2 -- 女" << endl;
// 性别
int Sex = 0;
while (1) {
cin >> Sex;
if (Sex == 1 || Sex == 2) {
abs->personArrary[abs->m_Size].m_Sex = Sex;
break;
}
else {
cout << "输入有错误，请重新输入" << endl;
}
}
// 年龄
cout << "输入年龄" << endl;
int age = 0;
cin >> age;
abs->personArrary[abs->m_Size].m_Age = age;
// 电话
cout << "输入电话" << endl;
string num;
cin >> num;
abs->personArrary[abs->m_Size].m_phone = num;
// 家庭地址
cout << "输入家庭地址" << endl;
string address;
cin >> address;
abs->personArrary[abs->m_Size].m_Addr = address;
// 更新通讯录人数
abs->m_Size++;
cout << "添加成功" << endl;
system("cls");
}
}
// 2、显示联系人
void showPerson(struct AddressBooks *abs)
{
if (abs->m_Size == 0)
{
cout << "当前记录为空" << endl;
}
else
{
for (int i = 0;i < abs->m_Size;i++)
{
cout << "姓名：" << abs->personArrary[i].m_Name << "\t";
// 三目运算符 表达式1 ？表达式2: 表达式3
// 当 表达式1 为true, 返回 表达式2 ；否则返回 表达式3
cout << "性别：" << (abs->personArrary[i].m_Sex==1 ? "男":"女") << "\t";
cout << "年龄：" << abs->personArrary[i].m_Age << "\t";
cout << "电话：" << abs->personArrary[i].m_phone << "\t";
cout << "住址：" << abs->personArrary[i].m_Addr << endl;
}
}
system("pause");
system("cls");
}
//(1).判断联系人是否存在
int isExist(AddressBooks *abs, string name)
{
for (int i = 0;i < abs->m_Size; i++)
{
if (abs->personArrary[i].m_Name == name)
{
return i;
}
}
return -1;
}
//3、删除联系人
void delPerson(struct AddressBooks *abs) {
cout << "请输入您要删除的联系人名字" << endl;
string name;
cin >> name;
// (1). 判断联系人是否存在
int ret = isExist(abs, name);
if (ret != -1) {
// 利用 for 循环对要删除的联系人的后面数据进行前移，执行完整个通讯录 abs->m_Size
for (int i = ret;i < abs->m_Size;i++) {
abs->personArrary[i] = abs->personArrary[i + 1]; // 将后面的数据依次往前移
}
abs->m_Size--;
cout << "删除成功" << endl;
}
else {
cout << "没有此联系人" << endl;
}
system("pause"); // 如果没有这一行的话，那么执行完函数 delPerson 将会直接清空
system("cls");
}
//4、查找联系人
void findPerson(struct AddressBooks *abs) {
cout << "请输入您要查找的联系人" << endl;
string name;
cin >> name;
int ret = isExist(abs, name);
if (ret != -1) {
cout << "姓名" << abs->personArrary[ret].m_Name << "\t";
cout << "性别" << abs->personArrary[ret].m_Sex << "\t";
cout << "年龄" << abs->personArrary[ret].m_Age << "\t";
cout << "电话" << abs->personArrary[ret].m_phone << "\t";
cout << "住址" << abs->personArrary[ret].m_Addr << endl;
}
else {
cout << "查无此人" << endl;
}
system("pause");
system("cls");
}
// 5、删除联系人
void modifyPerson(AddressBooks *abs) {
cout << "输入您要修改的联系人" << endl;
string name;
cin >> name;
int ret = isExist(abs, name);
if (ret != -1) {
string name;
cout << "请输入姓名：" << endl;
cin >> name;
abs->personArrary[ret].m_Name = name;
cout << "请输入性别：" << endl;
cout << "1 --- 男" <<"\t" << "2 -- 女" << endl;
int Sex;
cin >> Sex;
abs->personArrary[ret].m_Sex = Sex;
cout << "请输入年龄：" << endl;
int Age;
cin >> Age;
abs->personArrary[ret].m_Age = Age;
cout << "输入电话" << endl;
string phone;
cin >> phone;
abs->personArrary[ret].m_phone = phone;
cout << "输入地址" << endl;
string addre;
cin >> addre;
abs->personArrary[ret].m_Addr = addre;
}
else
{
cout << "查无此人" << endl;
}
system("psuse");
system("cls");
}
// 6、联系人清空
void clearPerson(struct AddressBooks* abs) {
cout << "该步骤是清空您通讯录的联系人" << endl;
cout << "输入 0 表示您确认清空" << endl;
int m_Size;
cin >> m_Size;
if (m_Size == 0) {
abs->m_Size = m_Size;
cout << "联系人已经清空" << endl;
}
system("pause");
system("cls");
}
int main() {
AddressBooks abs; // 定义结构体类型 AddressBooks 的变量 abs
abs.m_Size = 0; //初始化通讯录中人数
int select = 0;
while (true)
{
showMenu();
cin >> select;
switch (select)
{
case 1: //添加联系人
addPerson(&abs);
break;
case 2: //显示联系人
showPerson(&abs);
break;
case 3: //删除联系人
delPerson(&abs);
break;
case 4: //查找联系人
findPerson(&abs);
break;
case 5: //修改联系人
modifyPerson(&abs);
break;
case 6: //清空联系人
clearPerson(&abs);
break;
case 0: //退出通讯录
cout << "欢迎下次使用" << endl;
system("pause");
return 0;
break;
default:
break;
}
}
return 0;
}